AS721 214.53.40.0/21 CIDR and IP Range Summary.ASN: 721 - DoD Network Information CenterHost Count: 2046Addressable IPs: 2048214.53.40.0/24214.53.41.0/24214.53.42.0/24214.53.43.0/24214.53.44.0/24214.53.45.0/24214.53.46.0/24214.53.47.0/24